Rotate pages

GroupDocs.Merger allows to change page rotation angle by setting it to 90, 180 or 270 degrees for specific or all document pages.
Here are the steps to change page rotation:

  • Initialize RotateOptions class with desired rotation angle and page numbers;
  • Instantiate Merger object with source document path or stream;
  • Call RotatePages method and pass RotateOptions object to it;
  • Call Save method specifying file path to save resultant document.

The following code sample demonstrates how to change page rotation:

string filePath = @"c:\sample.pdf";
string filePathOut = @"c:\output\result.pdf";

RotateOptions rotateOptions = new RotateOptions(RotateMode.Rotate180, new int[] { 2, 3, 6 });

using (Merger merger = new Merger(filePath))
{
    merger.RotatePages(rotateOptions);
    merger.Save(filePathOut);
}

More resources

Advanced Usage Topics 

To learn more about document merging features, please refer the advanced usage section.

GitHub Examples 

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full featured .NET library we provide simple, but powerful free Apps.
You are welcome to merge your documents with our free online GroupDocs Merger App.